Letter opener



FIG. 1 is a top, front left side perspective view of a letter openershowing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a rear elevational view thereof; and

FIG. 6 is a bottom plan view thereof.

The ornamental design for a letter opener, as shown and described.